This is the description of the Goloka Vṛndāvana planet in the Brahma-saṁhitā. The first description is, "That planet is made of cintāmaṇi gems." Cintāmaṇi gem means... If you get by chance imitation cintāmaṇi gem, you can turn iron into gold. That is cintāmaṇi gem. So these things are there. One may believe or not believe, but we believe because we believe in the śāstra. So we have no botheration.
So there is Goloka Vṛndāvana planet, Kṛṣṇaloka, and Vaikuṇṭhaloka. There are... As there are different grades of lokas, planets... Here also, in this material world, there is one planet which is called Siddhaloka. Siddhaloka means there the inhabitants (are) automatically perfect in all yogic practice. Yogic practice means... If you become perfect in yogic practice, you can fly in the air without any instrument. Aṇimā laghimā prāpti īśitā vaśitā. There are eight kinds of siddhi. You are sitting here. If you want such and such thing from London, you can get immediately. This is called siddhi, prāpti. You can become the smaller than the smallest. You can be packed up in a box. We have seen it. And you'll come out. In Bose's circus, Calcutta, in our childhood, we saw this yogic practice. A man was tied up, hands and legs, put into a bag. The bag was sealed up, again put into a box. The box was locked and sealed. And the man again came out. We have seen. So yogic practice is such... Yes. Prāpti siddhi aṇimā. You can become the smaller... There was a saintly person in Benares, Trailanga Baba. So he was practiced to sit naked in the public road. So government objected that "You cannot sit naked here." So he did not speak. So he was arrested and taken to the custody and put into the jail. He again came out. He again came out.